以下句子变成复数句Is this your ruler?yes,it is.It's his backpack.What is this in English

以下句子变成复数句Is this your ruler?yes,it is.It's his backpack.What is this in English whose knife is this?将句子变成复数 把下列句子变成复数形式.This is a watch. this is not my umbrella.把句子变成复数形式 is this mary‘s doll?将句子变成复数 this is a bix.变成复数的句子怎么变 Is this his eraser 把这句单数句变成复数句 请用复数形式改写以下句子,“This is his case.”还有“This is her hat .Is my coat smart? This is my parent.(变成复数形式) this is a banana tree_________(变成复数) 将以下句子改为复数形式1.This is a black and grey shirt. 将句子变成复数句1.This is a book.2.That isn't an egg.3.IS this a book?Yes,it is.4.picture is very good this is her baby .先变复数,然后变成否定句 将下列句子变成复数句 he is my brother 变成复数句子 怎样讲解英语中把句子变成复数形式,如This is her sister.其中her要变成their吗 将下列句子变成复数形式My blouse is newMy blouse is newI'm a teacher This is your case It is a watch.变成复数句